This project shows how to control a home appliance with Arduino. Bluetooth module HC05 sends command from mobile. Relay switches the AC load like bulb or fan. Arduino Bluetooth Appliance Controller Circuit is simple and safe when wired correctly. Good for beginners who want home automation. Arduino Coding: Code Explanation: Circuit Working: Parts List: Item […]
Arduino Line Follower Robot Circuit
Arduino Line Follower Robot Circuit uses sensors and motors. IR sensors look at floor all time. They find black line and white area. Arduino read these sensor signals. Then it tell motor driver what to do. Motor driver control wheels speed and direction. Robot follow black line by itself. Arduino Coding: Code Explanation: Circuit Diagram: […]
Simple PIR Motion Detector Circuit
This circuit uses a PIR sensor to detect human motion. When motion happens, PIR output goes high. This high signal turns ON an LED through a resistor. Simple PIR Motion Detector Circuit is easy to make and works with 12V supply. Circuit Working: Parts List: Part Name Value Quantity Resistors 220Ω 1/4 watt 1 Semiconductors […]
Simple Thermistor Based Fire Alarm Circuit
This Simple Thermistor Based Fire Alarm Circuit is very small, simple and smart. It uses a thermistor to sense heat fast. When temperature goes high the circuit wakes up and makes loud sound. No microcontroller, no complex parts. Only few components and we get a working fire alert that anyone can build at home Circuit […]
Fire Alarm Circuit using IC LM358
This Fire Alarm Circuit using IC LM358 is simple but smart. It uses a 10k thermistor and LM358 IC. It watches heat using a thermistor and makes buzzer ring when danger comes. This circuit is cheap and is good for home, school projects and safety demos. Circuit Working: Parts List: Component Value / Type Resistors […]
Smoke Detector Circuit using IC LM358
This circuit is for simple Smoke Detector Circuit using IC LM358. It uses MQ2 gas sensor to sense smoke. It uses LM358 IC to compare sensor voltage. When smoke is present the buzzer and LED turn ON. This circuit is good for beginners. Circuit Working: Parts List: Component Quantity Resistors 10k 1/4 watt 1 100Ω […]